厚大破碎矿体采场矿岩冒落规律及影响因素研究  

The Caving Process and Influential Factors in the Stope of Thick and Large Fractured Ore Body

作　　者：李晓斌 勒治华 樊硕 李新成 Li Xiaobin;Jin Zhihua;Fan Shuo;Li Xincheng(Shenkan Qinhuangdao General Engineering Design&Research Institute Corporation,MCC,Qinhuangdao 066004,Chi⁃na;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]中冶沈勘秦皇岛工程设计研究总院有限公司,河北秦皇岛066004 [2]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《金属矿山》2020年第6期172-176,共5页Metal Mine

摘　　要：自然崩落法矿岩冒落是拉底卸荷、矿岩冒落、直至形成平衡拱的过程,其本质则是不断重复该过程。矿岩冒落规律受其地应力、采场结构参数、矿岩物理力学性质等地质因素和工程因素的影响,目前的研究多是假定为二维模型,侧重于采用理论方法或数值模拟分析冒落过程和冒落拱形态,较少涉及三维空间的冒落过程研究。根据矿岩冒落过程的主要特征参数,建立了描述该过程力学特征的本构模型,并采用FLAC3D实现数值模拟,模拟研究了矿体赋存深度、侧压力系数、拉底形态及采场尺寸参数对矿岩冒落规律的影响,研究结论有助于指导现场实践。Ore rock caving in the natural caving method is a process of undercutting and unloading,ore-rock caving and even forming a balance arch.Its essence is to repeat the process continuously.The regularity of ore rock caving is affected by geological and engineering factors such as ground stress,stope structural parameters,physical and mechanical properties of ore rock.At present,most of the research is assumed to be two-dimensional model,focusing on the theoretical method or numerical simulation analysis of the caving process and the shape of the caving arch,less involving the research of the caving process in three-dimensional space.According to the main characteristic parameters of the ore rock caving process,a consti⁃tutive model is established to describe the mechanical characteristics of the process,and FLAC3D is used to realize the numer⁃ical simulation on the effects of the ore body occurrence depth,side pressure coefficient,bottom form and stope size parame⁃ters on the regularity of ore rock caving.The research conclusions are helpful to guide the field practice.

关 键 词：地应力 采矿结构参数 冒落高度 冒落体积 

分 类 号：TD853.36[矿业工程—金属矿开采]